Add chopped potatoes to a bowl of water and soak for 10 minutes. Drain and pat the potatoes dry.
Mix sauce ingredients in a bowl and set aside.
Heat oil in a skillet over medium high heat. Add potatoes and cook undisturbed until browned on the bottom. Flip potatoes and brown the other side.
Add garlic and cabbage and cook 1 minute, stirring frequently.
Stir in sauce. Bring to a boil then reduce heat to medium low. Cover and simmer until potatoes are tender, about 10-15 minutes.
Turn off heat and garnish with green onions, sesame seeds, and a drizzle of sesame oil.
Video
Notes
1) Make it Gluten-Free: Some gochujang contain wheat or are manufactured in a facility that processes wheat, so check the ingredients label. I like this gluten-free gochujang*. Use tamari instead of soy sauce, or a gluten-free soy sauce.